Window-spring



EDWYARD DOEN, 0F NEV BRITAIN, CONNECTICUT.

WIND OW-SPRING.

Specification of Letters Patent No. 20,338, dated May 25, 1858.

To all whom it may concern:

Be it known that I, EDWARD DOEN, of New Britain, in the county of Hartford and State of Connecticut, have invented a new and Improved Window-Spring; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The nature of my invention consists in providing the grooved casing of a window in which the sash plays up and down with a good and durable bolt, controlled by an obtuse angled leverand spiral spring`which combined with the other parts for convenience I term window spring, designed to support and secure the sash when up or down or at any required point, the bolt being allowed to slip into holes or notches made opposite to it in the frame of the sash.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

I make my window spring of brass, iron, or any of the harder metals, the face plate, right angled socket and projections being one piece of cast metal; bolt ditto. The spring is spiral and of wound wire. The obtuse angled lever is also of cast or forged metal of the required shape, length and form.

Figure l, is a perspective view.

A, designates the face plate of the desired dimensions; B, B, the screw holes by which the spring is secured to the casing; C, the socket in which the bolt D, plays and is held when weighted; E, the spring chamber in which is coiled the spiral spring, one end being placed against the back of the chamber, the other coming against the end of the bolt and held at its center by a small point of the bolt entering the end of the spring, or by the end of the spring entering a hole of suiiicient size in the end of the bolt, as in Fig. 2. G, the yslot through which the thumb arm of the lever H protrudes and works, when freeing the bolt from the sash; I, I, the projections on both sides of the slot G, Fig. 2 to which the lever is attached by pin L, passing through it, and then thus forming the lever fulcrum; M, the slot through which the arm S of the lever works and is connected with the bolt by means of a hole T therein of sufficient size to admit the end -of said arm as in Fig. 2; C, the thumb piece which forms a part of the lever and is suiiicient distance from the fulcrum to clear the stop on the casing and make it accessible to the thumb or finger when it is desired to throw the bolt back out of the hole, or notch, in the sash in which it rests and by which said bolt holds and secures the sash when not retained by the lever. In order then when the spring is in position to throw the bolt out of and free the sash, the thumb arm of the lever which now forms its own angle that is an obtuse to the face plate of the spring, Fig. l, must be thrown in to right or nearly rightangles with the plate, and parallel with or to the face of the sash, as in Fig. 2. Sullicient room should therefore be left when placing' the spring in its position, so that the lever arm 26, shall not come in contact with the side of the sash, or cause it to rub in its up and down movements when the lever is thrown toward it for the purpose as described.

One of the advantages of this spring is the ease with which the bolt can be operated as described, the action of the independent lever on, and loosely geared as shown with the bolt, having little or no tendency to twist the bolt and make it bind, as pressure applied to a side arm extension from the bolt would be apt to do, though the connection of the two devices here is of a positive or firm and inflexible character. Also downward pressure or weight of the sash on the bolt, when t-he bolt is in lock with the raised sash, exerts no tendency to strain or bend the lever or otherwise affect its independent hang and operation. Thus is durability and efficiency secured. As the one casting serves to carry both the direct acting bolt and obtuse angled levermdevices which are independent though geared together,-the proper relative positions of the working parts is necessarily preserved; while the arrangement of the obtuse angled lever, not merely to the sash, but to the bolt which plays at right angles or thereabout to the motion of the sash, is an advantageous one, and such combination of the bolt and lever gives a facility of operation which many other locking bolt and other sash fasteners do not possess; thus, to shoot the bolt back, when desiring to raise or lower the sash, the pressure of t-he thumb or hand on the lever is not in line with or parallel to the play of the bolt, but at right angles to it, or nearly so, facing the sash, and thereby more convenient when having occasion to raise or lower the sash in a hurry, and though a somewhat similar shaped lever has been applied, in concert with a swivel locking device or tightening cam, to the sash, instead of to the casing, I ani not aware of any such arrange ment of lever and direct acting bolt, the locking action of which latter unlike a cani is altogether independent of the weight of the sash, ever before having been used, either as applied to the casing or sash, though in no instance do I propose to hang this fastening' in the sash, to which (were it practicable as arranged) there would be many 0bjections; a fixed position of a fastener in the more solid casing being always preferable, whether the locking catch be a direct acting bolt, as has before been used, or not.

By the use of an obtuse angled lever, in preference to a right angled one, room is economized in the play of the outer arm of the lever or a closer disposition of the f same secured relatively tothe face of the sash, and a straighter or more advantageous action given to the inner arm on starting back the direct acting bolt.

Having thus described my improvement, I desire to state that I do not claim as new any of the parts herein described, Separately considered, but- Ihat I do claim as new and useful, and desire to secure by Letters Patent, is-

The combination of the independent obtuse angled lever and direct acting spring bolt, arranged for action together relatively .to'eachf other and the face plate of the cast- EDVARD DOEN.

'Vitnesses 1 WVM. B. STANLEY WM. H. HART. 

